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There's a shiny new No. 1 on the Billboard Hot 100, as Rihanna's "Diamonds" rises 2-1. The song dethrones Maroon 5's "One More Night" (1-2) after a nine-week reign.

With her 12th Hot 100 topper, Rihanna ties Madonna and the Supremes for the fourth-most leaders in the chart's 54-year history. (The Supremes' sum does not include Diana Ross' six solo No. 1s.) Only the Beatles (20), Mariah Carey (18) and Michael Jackson (13; also not counting the Jackson 5's four No. 1s) have sent more titles to the top of the Hot 100.

Having first led the Hot 100 the week of May 13, 2006, with "SOS," Rihanna passes Carey as the female artist to reach 12 No. 1s the fastest. Rihanna's six-year, seven-month span between her first and 12th leaders bests Carey's seven-year, one-month, two-week stretch. Among all acts, only the Beatles (a rapid-fire, Beatlemania-fueled two years, four months and three weeks) and the Supremes (five years, four months) reached the milestone more quickly.

"Diamonds" introduces Rihanna's seventh studio set, "Unapologetic," released yesterday. While she has now banked 12 Hot 100 No. 1s, she's yet to top the Billboard 200 album chart. Stay tuned to Billboard.com for projections on whether "Unapologetic" could grant Rihanna her first Billboard 200 No. 1 next week.